The ice core record of atmospheric methane

Chappellaz, J.; Raynaud, D.; Blunier, T.; Stauffer, B. (2000). The ice core record of atmospheric methane. In: Khalil, Mohammad Aslam Khan (ed.) Atmospheric Methane : Its Role in the Global Environment (pp. 9-24). Springer 10.1007/978-3-662-04145-1_2

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The global evolution of atmospheric CH4 has been documented by sporadic direct measurements in the atmosphere during the 1960s and 1970s and by systematic survey only since 1979. The data from this time up to 1983 indicate an increasing trend at a rate of about 1% per year (Rasmussen and Khalil, 1986; Steele et al., 1987; Blake and Rowland, 1988). The most recent measurements indicate a decrease of the global accumulation of atmospheric CH4 during the years 1991 and 1992, and a return to a 1%/yr increase afterward (Steele et al., 1992; Dlugokencky et al., 1994; Lowe et al., 1994). The analysis of infrared solar absorption spectra (Rinsland et al., 1985; Zander et al., 1989) provides additional data of global concentrations for a few specific years (1951, 1975, 1981, 1984–87) and shows a mean increase of about 30% over the past 40 years. This long-term accumulation of CH4 in the atmosphere is related to human activities, particularly from agriculture.

Item Type:	Book Section (Book Chapter)
Division/Institute:	08 Faculty of Science > Physics Institute 08 Faculty of Science > Physics Institute > Climate and Environmental Physics
UniBE Contributor:	Blunier, Thomas, Stauffer, Bernhard
Subjects:	500 Science > 530 Physics
ISBN:	978-3-540-65099-7
Publisher:	Springer
Language:	English
Submitter:	BORIS Import 2
Date Deposited:	12 Jul 2022 14:06
Last Modified:	05 Dec 2022 15:54
Publisher DOI:	10.1007/978-3-662-04145-1_2
URI:	https://boris.unibe.ch/id/eprint/160980